In my current PBEM, I managed to do something I never have done before, and I am curious if it is WAD. Over 4 days, I concentrated about 100 HB & MB on a 6K max size Atoll. I stripped the supply by bombing the airfield, and by the fourth turn, the entire unit was wiped out by attrition, three days before I invaded.

Yes I have had this happen too. The answer, in game terms, is to stack a certain minimum number of units on the base so the 500lb love gets spread around more. This is where the "Coy" size units can be useful.